could you tell us Fallout 4 has no bugs about non removable quest item problem in Fallout 3 and New Vegas?
some quests you finished then related quest items that still in your inventory and can't remove it freely unless you use console command to remove it.
i asked this because until now you didn't resolved these problem. so i worry about this problem will still in Fallout 4.
don't try to tell us that players can remove it by console commands....because this is not a regular way to solve this problem. because it is a bug you must admitted.
if you didn't check this, then i hope you will check this before it released, that's all i wanna say.